Webster's 1828 Dictionary
EMBASSADOR
n. 1. A minister of the highest rank employed by one prince or state, at the court of another, to manage the public concerns of his own prince or state, and representing the power and dignity of his sovereign. Embassadors are ordinary, when they reside permanently at a foreign court; or extraordinary, when they are sent on a special occasion. They are also called ministers. Envoys are ministers employed on special occasions, and are of less dignity.
2. In ludicrous language, a messenger.
Webster's 1913 Dictionary
EMBASSADOR
Em *bas "sa *dor, n. Etym: [F. ambassadeur, Sp. embajador, LL. ambassiator, ambasciator. See Embassy, and cf. Ambassador. ]
Defn: Same as Ambassador. Stilbon, that was a wise embassadour, Was sent to Corinth. Chaucer. Myself my king's embassador will go. Dryden.
EMBASSADORIAL
Em *bas `sa *do "ri *al, a. Etym: [Cf. F. ambassadorial. ]
Defn: Same as Ambassadorial.
The Wordsmith Dictionary